mahnken



(No Model.) 2 sheets sneem 11 H. MAHNKEN & C, L. HEALY."

PRINTING TELEGRAPH REGEIVER. No. 366,178. Patented July 5, 1887 (NoModel.) 2 Sheets-Shet 2.

H. MAHNKEN & 0. L. HEALY.

PRINTING TELEGRAPH RECEIVER.

No. 366,178. Patented July5,1887.

I llllllllllllll i UNITED\ STATES HENRY MAHNKEN AND oLAnENoE L. HEALY, EBROOKLYN, ASSIGNORS TO PATENT OF ICE.

THE COMMERCIAL TELEGRAM COMPANY, OF NEW YORK, N. Y.

PRINTING-TELEGRAPH RECEIVER.

SPECIFICATION forming part of Letters Patent No. 366,178, dated July 5,1887.

Application filed February 1, 1887. Serial No. 226,144. (No model.)

jointly invented a certain new and useful Improvement inPrinting-Telegraph Receivers, of which the following is a specification.

The object we have in view is principally an improved escapement ortype-wheel movement for printing-telegraph receivers which will becapable of a high rate of vibration and will work with certainty andwith abundant power.

A further object is an arrangement of the inking-rollers which ride onthe type-wheels so that the type-wheels will be more uniform and steadyin their movement, they will be inked more uniformly, and the operationof the machine made more certain.

In the accompanying drawings, forming a' parthereof, Figure 1 is anelevation of the upper part of the machine from the type-wheel side;Fig. 2, a front elevation of the same; and Fig. 3, a horizontal sectionon the line 3 3 in Fig. 2, with the electro-magnet coils in elevation.

A and A are the side plates of the machine, which support the mechanism.They carry two weight-trains, as will be readily understood, terminatingin wheels to a, which engage with pinions b b on the shafts carrying thetype-wheels B B. The type-wheel shafts are arranged one as a sleeve overthe other, the type-wheels being located outside of the side plate A,and between it and a bracket, 0, secured thereto. A unison rockshaft, O,carries arms (I d, which engage alternately with pins 6 e, alternatelylocking the typewheel shafts at unison, one shaft being always free tobe turned by its driving-train.

The type-wheel shafts have escape-wheels D D, arranged side by sidecentrally between the side plates, A A, and with these escapewhcelsengage a laterally-vibrating escapement-anchor E. The anchor E iscarried by a vertical spindle, f, which is pivoted between a block, f,and a screw, f", the spindle having a collar which rests on the block f.Upon this spindle f, above the block f, is mounted an armature, F, whichis a short tube of soft which project toward each other.

iron,transversely through the center of which '30 the spindle f passes.

G is a permanent magnet which turns back upon itself, as shown, and hasits poles N S in the same horizontal plane. This magnet is large andpowerful. It is preferably made of cast-iron, and after being drilledand fitted is hardened by chemicals, and it is then magnetized. The poleN of the permanent magnetis grooved or hollowed out laterally, as shownat g, and in this recess the tubular armature F 50 vibrates. The pole ofthe permanent magnet partly incloses the tubular armature and forms astrong inductive field in which it plays. The recess 9 is brought closeto the armature F at the pivot of the armature, but slopes backward 6 5from this point to the ends of the recess, so as to approach as closelyas possible to the armature without interfering with its movement.

H is an electro-magnet which is mounted upon the pole S of the magnet G,with its cores in thesame horizontal plane as that occupied by thearmature, toward which they project. Two screws, h h, pass looselythrough holes in the pole S, without engagement of screwthreads therein,and enter the yoke of the elec- 7 5 tro-magnet, in which they engagewith screwthreads. A central screw, i, turns through a screw-threadedhole in the pole S, and sets against the back yoke of the electro-magnetbetween the screws h and h. By means of these three screws the approachof the cores of the electro-magnet to the tubular armature may be variedand adjusted, and the angular position of the electro-magnet cores withrelation to such armature can also be adjusted. The cores of theelectro-magnetH are provided on their ends with extension polar plates70 70,

The tubular armature F is flattened on its side next to theelectromagnet, so as to approach the polc- 9 plates 7c 70 with themaximum exposure of surface, and this flat face of the armature isprovided with a brass plate, Z, which prevents the armature fromsticking to the pole-plates 7a 7a whichit strikes in its movement,thearmature being limited in its movement by the pole plates.

The tubular armature gives a large inductive surface with the minimumweight, and the poles of the electromagnet are removed a greaterdistance from the permanent magnet, at the same time that the relationof the armature is intimate with both of these elements.

By providing the electro-magnet with in wardly-projecting polarextensions a short armature can be used with a large and powerfulelectromagnet. This polarized escapement is capable of an exceedinglyhigh rate of vibration and is powerful and certain in its action. Itsoffice, as will be well understood, is to vibrate the escapement-anehorE and permit the type-wheel shaft which is not locked at unison to berevolved by its drivingtrain.

WVith reference to the remaining feature of our invention theinking-rollers are shown at I I. These are carried by pivoted arms mm,and ride upon the type-wheels. Ourimprovement in this respect consistsin providing the inking-rollers with a SPIIUQIGDSIOH acting to hold themconstantly upon the type-wheels. To accomplish this in a simple manner,we conneet the arms in m by a light spring, n,which tends to draw therollers together and upon the type-wheels.

This device, while simple in its character, is far reaching in itseffects. \Vithout the spring-tension the inking-rollers are causedtojump on the type-wheels by the projecting types, and the result isthat the machine is made unsteady in its movements, even to the extentof occasionally throwing the wheels out of unison, and, in addition, theinking is not performed uniformly. The spring tension cures thesedefects.

What we claim is 1. In aprinting-telegraph receiver, the combination,with the escapement-anchor, of a permanent magnet, an electromagnet, anda tubular or hollow armature polarized by such permanent magnet,substantially as set forth.

2. In a printing-telegraph receiver, the combination, with theescapement-anchor, of a permanent magnet having a recessed pole, aneleetro-magnet, and an armature vibrating in the recess of the permanentmagnet and partly inclosed thereby, substantially as set forth.

3. In a printing-telegraph receiver, the combination, with theescapement-anchor, of a U permanent magnet having a recessed pole, anelectro-magnet, and a tubular or hollow armature vibrating in the recessof the permanent magnet and partly inclosed thereby, substan tially asset forth. I

4. In aprinting-telegraph receiver, the combination, with the escapementanchor, of a permanent magnet, a vibrating armature, an electro'magnet,and means for adjusting the eleetro-magnet to vary its distance from thevibrating armature and its angular relation thereto, substantially asset forth.

5. In a printing-tel egraph receiver, the com bination, with theescapcment-anchor, of a permanent magnet, a vibrating armature, anelectromagnet, and means for adjusting the electr0-magnet to vary itsdistance from the vibrating armature and its angular relation thereto,said vibrating armature being limited in its movement by striking thepoles of such electromagnet, substantially as set forth.

6. In aprinting-telegraph receiver, the combination, with theescapement-anchor, of a permanent magnet, an electro-magnet havingextension pole-plates projecting inwardly, and a short hollow or tubularvibrating armature,

substantially as set forth.

7. In aprintingtelegraph receiver, the combination, with theescapement-anchor, of a permanent magnet, an electro-maguet, and atubular vibrating armature located between the poles of theelectro-magnet and one pole of the permanent magnet, having its sidenext to the clectro-magnet flattened, substantially as set forth.

This specification signed and witnessed this 25th day of January, 1887.

HENRY MAIINKEN. CLARENCE L. HEALY. Witnesses:

H. Ross, C. BLAMELT.

